send one PC always into the first ISP

RouterOS General
1

Hi! I have two ISP’s and i want one IPPhone go always through the one ISP. What is the easiest way to reach this ?
My device is rb951iu-2hnd
Thank you

2

Check in IP → Routes → Rules

3

Russian support helped me. Thanks
Thats what i needed
ip route add gateway=1.1.1.1 routing-mark=markName
ip route rule add src-address=192.168.0.12 action=lookup-only-in-table table=markName